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Publication numberUS6227111 B1
Publication typeGrant
Application numberUS 09/175,962
Publication dateMay 8, 2001
Filing dateOct 21, 1998
Priority dateOct 21, 1998
Fee statusPaid
Also published asCN1115247C, CN1264644A, DE19944936A1, DE59905304D1, EP0995595A1, EP0995595B1
Publication number09175962, 175962, US 6227111 B1, US 6227111B1, US-B1-6227111, US6227111 B1, US6227111B1
InventorsDouglas Joseph Dawley, David John Gagnon
Original AssigneeHeidelberger Druckmaschinen Ag
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Impression setting mechanism for a printing unit
US 6227111 B1
Abstract
The present invention is related to a printing unit including a frame (2) and an upper plate cylinder (12) mounted in the frame (2). An upper blanket cylinder (16) is in selective contact with the upper plate cylinder (12), and a lower blanket cylinder (18) forms a nip with the upper blanket cylinder (16). A web (8) passes through the nip. A lower plate cylinder (14) contacts the lower blanket cylinder (18). Impression setting means (60, 62, 82) are assigned to movable housings (40, 44) of the movable cylinders (12, 14, 16). The impression setting means (60, 62, 82) are provided to adjust forces exerted on bearers (20) of the printing unit cylinders (12, 14, 16).
Images(7)
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Claims(21)
What is claimed is:
1. Printing unit comprising:
a frame;
an upper plate cylinder mounted in the frame;
an upper blanket cylinder in selective contact with the upper plate cylinder;
a lower blanket cylinder for forming a nip with the upper blanket cylinder;
a web passing through the nip;
a lower plate cylinder for contacting the lower blanket cylinder;
movable bearing housings for the upper plate, lower plate, and upper blanket cylinders, wherein the movable bearing housings for the upper and lower plate cylinders pivot about translatable pivot pins mounted in the frame, and translating the translatable pivot pins with respect to the frame cocks the upper and lower plate cylinders with respect to the upper and lower blanket cylinders; and
impression setting means assigned to the movable bearing housings of the upper plate, lower plate, and upper blanket cylinders for adjusting a force exerted upon bearers assigned to the upper plate, lower plate, and upper blanket cylinders.
2. Printing unit comprising:
a frame;
an upper plate cylinder;
a lower plate cylinder;
an upper blanket cylinder;
a lower blanket cylinder; and
a movable housing for each of the upper plate cylinder, the lower plate cylinder and the upper blanket cylinder, wherein
the upper plate cylinder is pivotally attached to the frame via the corresponding movable housing, and the upper plate cylinder rotates within the corresponding movable housing,
the lower plate cylinder is pivotally attached to the frame via the corresponding movable housing, and the lower plate cylinder rotates within the corresponding movable housing,
the lower blanket cylinder is fixedly mounted in the frame between the upper and lower plate cylinders, and
the upper blanket cylinder is pivotally attached to the frame, via the corresponding movable housing, between the upper and lower plate cylinders adjacent to the lower blanket cylinder, and the upper blanket cylinder rotates within the corresponding movable housing and forms a nip with the lower blanket cylinder;
a web passing through the nip formed by the lower blanket cylinder and the upper blanket cylinder;
an actuating member that is extendible and contractible; and
a plurality of compression means arranged on the actuating member to bias the movable housings so that
a) when the actuating member is contracted, the compression means bias the movable housings of the upper and the lower plate cylinders toward the upper blanket cylinder and lower blanket cylinder, respectively, and
b) when the actuating member is extended, the upper plate cylinder and the lower plate cylinder are separated from the upper and lower blanket cylinders, respectively.
3. Printing unit according to claim 2, further comprising stops fixed on the frame that limit a maximum extension of the actuating member.
4. Printing unit according to claim 2, further comprising stops arranged on the actuating member so that when the actuating member is extended, the stops force the upper plate cylinder and the lower plate cylinder away from the upper and lower blanket cylinders respectively, and force the upper blanket cylinder away from the lower blanket cylinder.
5. Printing unit of claim 4, wherein a first one of the stops arranged on the actuating member is located adjacent to the movable housing of the upper plate cylinder, a second one of the stops arranged on the actuating member is located adjacent to the movable housing of the upper blanket cylinder, and a third one of the stops arranged on the actuating member is located adjacent to the movable housing of the lower plate cylinder.
6. Printing unit of claim 4, wherein:
a first one of the stops and a first one of the plurality of compression means correspond to the movable housing of the upper plate cylinder;
the first one of the stops transfers force to the movable housing of the upper plate cylinder in a first direction, and the first one of the plurality of compression means transfers force to the movable housing of the upper plate cylinder in a second direction opposite to the first direction;
a second one of the stops and a second one of the plurality of compression means correspond to the movable housing of the lower plate cylinder; and
the second one of the stops transfers force to the movable housing of the lower plate cylinder in the second direction, and the second one of the plurality of compression means transfers force to the movable housing of the lower plate cylinder in the first direction.
7. Printing unit according to claim 2, wherein the compression means comprises compression springs.
8. Printing unit according to claim 2, wherein the compression means comprises cup springs.
9. Printing unit according to claim 2, wherein the compression means comprises a plurality of compression springs.
10. Printing unit according to claim 9, wherein the compression springs are mounted in series.
11. Printing unit according to claim 9, wherein the compression springs are mounted in parallel.
12. Printing unit according to claim 2, further comprising an actuating assembly for activating the actuating member.
13. Printing unit according to claim 12, wherein the actuating assembly comprises a hydraulic cylinder.
14. Printing unit according to claim 12, wherein the actuating assembly comprises a pneumatic cylinder.
15. Printing unit according to claim 12, wherein the actuating assembly comprises at least one of a fluid driven motor and an electrical motor.
16. Printing unit according to claim 12, wherein the actuating assembly comprises an upper attachment and a lower attachment and is connected between upper and lower segments of the actuating member via the upper and lower attachments respectively.
17. Printing unit according to claim 2, wherein the printing unit further comprises a spring assembly for biasing the movable housing for the upper blanket cylinder to pivot the upper blanket cylinder toward the upper plate cylinder.
18. Printing unit according to claim 2, wherein the movable housing for the upper blanket cylinder pivots about a pivot pin fixed to the frame.
19. Printing unit according to claim 2, further comprising at least one separate actuating member connected at one end to the frame and at the other end to the movable housing of the upper blanket cylinder, and arranged to pivot the upper blanket cylinder away from the lower blanket cylinder and create a gap between only the upper blanket cylinder and the lower blanket cylinder.
20. Printing unit according to claim 19, wherein each at least one separate actuating member includes a separate stop for exerting force on the movable housing of the upper blanket cylinder to pivot the upper blanket cylinder.
21. Printing unit comprising:
a frame;
an upper plate cylinder mounted in the frame;
an upper blanket cylinder in selective contact with the upper plate cylinder;
a lower blanket cylinder for forming a nip with the upper blanket cylinder;
a web passing through the nip;
a lower plate cylinder for contacting the lower blanket cylinder; and
impression setting means assigned to movable bearing housings of the upper plate, lower plate, and upper blanket cylinders for adjusting a force exerted upon bearers assigned to the upper plate, lower plate, and upper blanket cylinders, the impression setting means including compression means for exerting force on the movable housings of the upper and lower blanket cylinders;
wherein the compression means is adjustable to vary the force exerted by the compression means on the movable housings of the upper and lower plate cylinders.
Description
FIELD OF THE INVENTION

The present invention is related to an insensitive, reliable impression setting and throw-off mechanism for a printing unit, particularly for a printing unit equipped with bearers.

BACKGROUND OF THE INVENTION

EP 0 193 012 A2 discloses a printing press and method for moving printing cylinders between thrown-off positions in which bearers connected with the cylinders are separated and thrown-on or placed in printing positions. The printing cylinders are urged into thrown-off positions by springs, which in one embodiment of the invention apply a biasing force to pivotally mounted support screws for the cylinders. In another embodiment the cylinders are mounted on cantilevered leaf springs which urge the cylinders towards their thrown-off positions. A motor is provided to apply a force directly to one of the printing cylinders to move it from its thrown-off position to its printing position. The other printing cylinders are moved from their thrown-off positions to their printing positions under the influence of forces transmitted between bearers connected with the printing cylinders.

EP 0 625 423 A1 corresponding to U.S. Pat. No. 5,301,609 discloses a printing unit with skew and throw-off mechanisms. A printing unit includes a frame, first and second brackets, and upper and lower plate cylinders. The first bracket is supported on the frame for movement relative to the frame. The upper plate cylinder has an end supported to move with the first bracket. The second bracket also is supported on the frame for movement relative to the frame, and the lower plate cylinder has an end supported to move with the second bracket. The printing unit also includes a skewing mechanism and a throw-off mechanism. The skewing mechanism moves the brackets transversely relative to the frame independently of each other. The throw-off mechanism pivots the brackets relative to the frame. The throw-off mechanism includes a pressure cylinder and a piston rod connected between the two brackets. The pressure cylinder and the piston rod are pivotally connected to the brackets and move pivotally relative to the brackets when the brackets are moved transversely by the skewing mechanism. The throw-off mechanism thus permits the brackets to be skewed independently of each other, while remaining connected with each other for throw-off.

Pending U.S. patent application Ser. No. 09/103,710 discloses an offset printing press for printing on a web. The press includes a frame, a first plate cylinder movably mounted in the frame, and a first blanket cylinder in selective contact with the first plate cylinder. A second blanket cylinder for forming a nip with the first blanket cylinder is in contact with a second plate cylinder. The press has a first operative condition, wherein the first plate cylinder and the first blanket cylinder are in direct contact with each other when double sided printing on the web is performed. In a second operative condition, the first plate cylinder and first blanket cylinder are separated to permit plates on the first cylinder to be changed while the second plate cylinder and the second blanket cylinder are printing on the web.

Different versions of impression setting are encountered in the technical field related to rotary printing presses. Various throw-off assemblies for bearered printing presses have been publically disclosed for many years, for example throw-off assemblies in various product lines that press manufacturers have long made available. The existing methods of setting impressions are time consuming, difficult to gauge or accurately tune, and require expensive assemblies. To set the desired impression, particularly the bearer squeeze, for each nip in the impression area, existing publically known designs require an operator to rotate a large, eccentric bearing housing by manually adjusting a turnbuckle mechanism or the like. The amount of squeeze attained is very sensitive to the turnbuckle's adjustment. There is no simple method of measuring the resulting impression setting. The eccentric bearing housings used with this method tend to both wear unacceptably over the time and bind in the side frames during adjustment. Due to the unavoidable wear of components, the impression assemblies require periodic readjustment in the field which imposes an unavoidable downtime on the respective printing press.

Separate mechanisms are required both to set the impression and to throw the cylinders off impression. This adds both cost and complexity to the assembly. There are no provisions to separate the blanket cylinders while leaving the plates in contact. Such a feature would allow the printing plates to be changed with the webs still in place.

During normal operation of the machine it is at times necessary to cock each of the plate cylinders with respect to the adjacent blanket cylinder by displacing one end of the plate cylinders. In the existing designs this relative angular motion results in a significant change in impression setting at the movable end of the respective cylinders.

In the past, various attempts have been undertaken to eliminate these deficiencies outlined above. Bearing housings with very small eccentrics have been linked to finely threaded turnbuckles in an attempt to desensitize the adjustment. The resulting, large mechanical advantage tended to make the assemblies self-locking. However when a broken web wrapped the printing cylinders the adjustments would not move or yield, potentially resulting in permanent damage to the printing cylinders. To minimize the binding and the wear at the frame housing interface, the thickness through the bores was increased and complex lubrication assemblies were introduced. This was only partially effective and added significantly to the costs of the respective assemblies.

SUMMARY OF THE INVENTION

In view of the prior art outlined above and the problems encountered in the technical field it is accordingly an object of the present invention to preset impression upon press production and assembly and to avoid readjustment in the field.

Furthermore, it is an object of the present invention to adjust impression setting in an easy way that is relatively insensitive compared to previous designs.

Still another object of the present invention is to eliminate wear of the bearing house and to allow for a cocking of the plate cylinders without affecting the impression settings.

According to the present invention, a printing unit includes a frame, an upper plate cylinder mounted in the frame, an upper blanket cylinder in selective contact with the upper plate cylinder, a lower blanket cylinder for forming a nip with the upper blanket cylinder a web passing the nip, a lower plate cylinder for contacting the lower blanket cylinder, and impression setting means assigned to movable housings of the movable cylinders to adjust forces exerted upon bearers respectively assigned to the printing unit cylinders.

The numerous advantages resulting from the present invention allow for a very easy setting of the impression parameters during assembly of the respective press in the factory. There is no more need for readjustments in the field, once the press is with the customer and has been set up. Now that the bearings of the respective cylinders are mounted in movable housings, bearing house to bearing bore wear in the side frame is eliminated, thus no friction generated corrosion occurs in the side frame of the respective printing unit. As the plate and blanket cylinders are pretensioned by compression springs assigned to the respective cylinder bearing housings, the cylinders can move and yield in the event objects become wedged between the cylinders, for example when a web breaks and becomes wrapped around a cylinder.

In accordance with exemplary embodiments of the present invention, an actuating member is assigned to the movably mounted cylinder/bearing housings and actuates the housings together. The actuating member is mounted in fixed stops that are mounted in the respective side frame of the printing unit. The actuating member is provided with a plurality of stops, each of which cooperates with respective levers of the movable housings. The housing levers are biased by means of compression elements assigned to the impression setting means. The compression means can be compression springs or a plurality thereof arranged in serial or parallel connection; likewise a cup spring arrangement can be used.

The previously mentioned actuation member can be a hydraulic cylinder, or a pneumatic cylinder loaded with a pressurized fluid. Integrated into the actuating member are an upper attachment and a lower attachment, respectively, to which the actuating member provided with the compression means is assigned.

To compensate for the weight of the movable upper blanket cylinder, a spring-biased compensation assembly is assigned to this cylinder. The upper blanket cylinder can be moved by means of a separate actuating member which may comprise a hydraulic or pneumatic cylinder for actuation. This allows the upper blanket cylinder to be separated from the lower blanket cylinder so that the printing plate can be changed with the web in place, i.e., between the blanket cylinders. By means of the separate actuation member, the upper blanket cylinder can be activated or actuated independently of the lower cylinders.

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing and other features of the present invention will become apparent to those skilled in the art upon reading the following description of preferred embodiments of the invention in view of the accompanying drawings, wherein:

FIG. 1 shows a representation of side view of an impression area.

FIG. 1A shows a cross section of a cylinder assembly along the lines IA—IA shown in FIG. 1.

FIG. 2 shows the mechanism of FIG. 1 in the thrown-off condition.

FIG. 3 shows the mechanism of FIG. 1 with only the blanket cylinders only separated.

FIG. 4 shows the mechanism of FIG. 1 with a broken web wrapped around the lower blanket cylinder.

FIG. 5 shows a fixed stop mounted in a side frame of a printing unit, in accordance with an exemplary embodiment of the invention.

FIG. 6 shows a compression element including a plurality of coil springs mounted in series, in accordance with an exemplary embodiment of the invention.

FIG. 7 shows a compression element including a plurality of coil springs mounted in parallel, in accordance with an exemplary embodiment of the invention.

FIG. 8 shows a compression element including a cup spring, in accordance with an exemplary embodiment of the invention.

DESCRIPTION OF THE PREFFERED EMBODIMENTS

FIG. 1 represents a view of the impression area of a printing unit.

A printing unit 2 comprises an upper printing cylinder pair and a lower printing cylinder pair. The upper printing unit cylinder pair essentially consists of an upper plate cylinder 12 and an upper blanket cylinder 16 both of which are movable about pins 26 and 24, respectively. The lower printing unit cylinder pair essentially consists of a lower blanket cylinder 18 and a lower plate cylinder 14. The lower plate cylinder 14 is movable about a pin 28, as described in greater detail below. The lower blanket cylinder 18 is fixed with respect to a side frame 4 of the respective printing unit 2. A web of material 8 travels in a web travel direction 10 and passes through a nip formed between the surfaces of the movably mounted upper blanket cylinder 16 and the stationary mounted lower blanket cylinder 18. The upper movably mounted plate cylinder 12 is mounted in a plate cylinder bearing housing 40 having a lever 42. The upper blanket cylinder 16 is mounted in a blanket cylinder bearing housing 44 having a lever 46.

In the lower printing unit cylinder pair the lower blanket cylinder 18 is mounted in a stationary fashion so that the rotational axis of the lower blanket cylinder 18 does not move with respect to the side frame 4. The movably mounted lower plate cylinder 14 is journaled in a plate cylinder housing bearing 40 having a lever 42. An actuating assembly including a rod 64 is arranged somewhat inclined with respect to the web travel plane 6. The actuating assembly further includes an actuating assembly 48 having an upper attachment 50 and a lower attachment 52. The actuating assembly 48 may comprise a pneumatic cylinder, a hydraulic cylinder or an electromagnetic device or may even comprise an electric motor or another suitable driving means.

The actuating member is mounted between an upper fixed or end stop 34 and a lower fixed or end stop 36. Each of the stops 34, 36 is mounted on a respective side frame 4 of the printing unit 2, for example as shown in FIG. 5. An upper stop 38 is mounted on the rod member 64, and is assigned to the lever 42 of the plate cylinder bearing housing 40 of the upper plate cylinder 12. Above the upper attachment 50 a stop 47 is mounted on the rod member 64. The stop 47 is assigned to the lever member 46 of the blanket cylinder bearing housing 44 for the upper blanket cylinder 16. A lower stop 54 near the lower attachment 52 is assigned to the lever member 42 of the blanket cylinder bearing housing 40.

FIG. 1 further discloses that the blanket cylinder bearing housing 44 can be actuated by a separate actuating member set 72. The separate actuating member set 72 may include a cylinder 73 that is alimented via fluid pipes 78. The actuating member further includes a separate stop 74 which is mounted on a rod 75 extending from the cylinder 73. The separate stop 74 is mounted on the rod 75, so as to contact the lever 46 from its bottom side. The cylinder is journalled in a cylinder mounting 76 mounted in a side frame 4 of the printing unit 2. Furthermore, an additional spring assembly 66 is assigned to the lever 46 of the blanket cylinder bearing housing 44. The additional spring assembly 66 comprises a compression means 68 such as a helical spring which is supported by a disc-shaped element 82. The compression means 68 may be mounted and secured upon a rod element 70, so that the compression element 68 support the lever 46 on its bottom side.

The additional spring assembly 66 is provided to compensate for the additional weight of the upper movable blanket cylinder 16. Since the lower blanket cylinder 18 is mounted in a fixed position with respect to the side plates 4, the actuating assembly 48 is intended to move two upper printing unit cylinders and one lower printing unit cylinder. Thus, the additional spring assembly 66 compensates the additional weight of the upper movable blanket cylinder 16 on the cylinder assembly 48.

FIG. 1A shows schematically how the plate and blanket cylinder housings 40, 44, are mounted in the side frames 4. FIG. 1A shows a view of a portion of the mechanism illustrated in FIG. 1, along the lines IA—IA.

On a stub shaft 32 of the printing unit cylinders 12, 14, and 16, a bearer 20 is mounted. By means of the actuating assembly 48 and the upper and lower pretensioning members 60, 62, the bearer contact is adjustable within a large adjustment range, as will be described below. FIG. 1A shows how the plate or blanket cylinder bearing housing are movably mounted within the side frames 4 of the printing unit 2 so that the cylinder bearing housings 40, 44 can pivot around the pivot pins 24, 26 and 28 to move along a surface of the side frames 4. Within the plate or blanket cylinder bearing housings a respective opening 22 is provided to receive the printing unit cylinder bearing 30. To allow for the movement of the plate or blanket cylinder bearing housings 40, 44 along the surface of the side frames 4, the housings 40, 44 pivot about the fixed pivot pin 24 and the translating pivot pins 26, 28.

FIG. 2 shows the printing unit cylinders of FIG. 1 in a thrown-off position.

In this stage the actuating assembly 48 moves the lower attachment 52 in a downward direction, thus the lower stop 54 moves the lower plate cylinder bearing housing 40 about the translating pivot pin 28. The upper attachment 50 moves in an upper direction, so as to move the stop 47 and the upper stop 38. Consequently, the upper plate cylinder bearing housing 40 and the upper blanket cylinder bearing housing 44 will move and rotate upwards about the fixed pivot pin 24 and the translating pivot pin 26. In this stage the additional spring assembly 66 compensates for the weight of the upper blanket cylinder 16. Since all of the movable cylinders are force-loaded by means of springs 56, 68, the impression settings are not changed significantly upon cocking of the respective plate cylinders 12, 14. Since the plate cylinder bearing housings 40 are journalled in translating pivot pins 26, 28, a cocking movement of the plate cylinders 12, 14 with respect to the blanket cylinders 16, 18 is achievable. In the stage shown in FIG. 2, the second actuating unit 72 is not in use, the three movable cylinders are actuated by the actuating unit 48, and the upper movable blanket cylinder is supported by an additional spring assembly 66.

In FIG. 3 a separate throw-off of the upper movable blanket cylinder 16 is shown.

In this configuration, the upper blanket cylinder bearing housing 44 is moved by a second actuating member 72 via the lever 46. The actuating member 48 is in its inactivated position, thus the separate actuating member 42 impacts on the upper blanket cylinder bearing housing 44 only. As can be seen in FIG. 3, a nip is created between the surface of the upper blanket cylinder 16 and the surface of the lower stationary blanket cylinder 18. Since the blanket cylinders 16, 18, can be independently separated from each other, plate changes can be performed while the web 8 remains in place within the printing unit 2.

In FIG. 4 a partial wrap-up of a web of material on the stationary blanket cylinder is shown.

In this configuration a broken web is partially wrapped around the circumference of the stationary lower blanket cylinder 18. The wrapped portion of the broken web is indicated with reference numeral 84. The wrapped portion of the web 8 increases the outer diameter of the lower blanket cylinder 18 substantially, so as to move the upper plate cylinder 12 and the upper blanket cylinder 16 about the respective pins 24, 26, whereas the lower plate cylinder 14 is moved about its corresponding translating pin 28. The plate cylinders 12, 14 are pretensioned by compression springs 56. The springs 56 allow the cylinders to move about the pins 24, 26, and 28 when an object such as a broken web becomes wedged between the cylinders, thus preventing damage. As can be seen in FIG. 4, the actuating member 48 is in its inactivated position, and the relative movements of the upper plate cylinder 12 and the upper blanket cylinder 16 and of the lower plate cylinder 14 are due only to the increase in the diameter of the stationary blanket cylinder 18.

Given the above-mentioned behaviour of the movable printing unit cylinders 12, 14, and 16, respectively, due to the pretensioned stage of the cylinders a potential wrap-up of a web of material 8 does not damage the cylinders 12, 14, 16, respectively. The pretensioning means 60, 62 arranged above the compression means 56 allow for an easily gauged adjustment of the respective pretensioning force. Thus, a precise pressure between the respective bearers 20 surfaces can be set in the factory. The pressure will not need to be readjusted in the field later on, and the upper and lower plate cylinders can be cocked with respect to their blanket cylinders without adversely affecting the precise pressure. Thus, pre-adjusted impression settings can be maintained while cocking the plate cylinders 12, 14, that are respectively journalled in the translating pivot pins 26, 28. The upper and lower pretensioning means 60, 62 may be nuts, a quarter turn of which changes a bearer contact stripe width by approximately 0.001″ which is less than 2% of the full adjustment range. A further advantage of the present invention is the ease with which a required force for an impression setting can be set and gauged. After a predetermined pretensioning or setting force is set, the magnitude of an impression setting can be easily gauged by measuring the position of the upper and lower pretensioning means 60, 62, which can each be a nut, for example.

The compression elements 56, 68 can be helical compression springs such as the spring 88 shown in FIG. 7, and can also each be composed of multiple springs in either a parallel configuration as shown in FIG. 7 or a series configuration shown in FIG. 6. FIG. 7 shows two springs 88, 90 in a parallel configuration that also has the spring 90 located concentrically with the spring 88. FIG. 6 shows two springs 92, 94 located end-to-end in a series configuration.

The compression elements 56, 68 can also include cup springs, an example of which is illustrated in FIG. 8. FIG. 8 shows a cup spring 58 located between the disk element 58 and the lever 42, 46. The impression setting means referred to in the Summary of the Invention above can include, for example, the spring assembly 66, the upper and lower pretensioning members 60, 62, the disk elements 58, 82, and the springs 56, 68.

Without further analysis, the foregoing fully reveals the gist of the present invention so that others can apply current knowledge to readily adapt the present invention for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention. Therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

REFERENCE NUMERAL LIST

2 printing unit

4 side frame

6 web travel plane

8 web

10 web travel direction

12 upper plate cylinder

14 lower plate cylinder

16 upper blanket cylinder

18 lower blanket cylinder (fixed)

20 bearer

22 bracket

24 fixed pivot pin

26 translating pivot pin

28 translating pivot pin

30 bearing

32 stub shaft

34 upper fixed stop

36 lower fixed stop

38 upper stop

40 plate cylinder bearing housing

42 lever

44 blanket cylinder bearing housing

46 lever

47 stop

48 cylinder assembly

50 upper cylinder attachment

52 lower cylinder attachment

54 lower stops

56 compression means

58 disk element

60 upper pretensioning means

62 lower pretensioning means

64 rod

66 additional spring assembly

68 compression means

70 rod

72 second cylinder set

73 cylinder

74 separate stop

75 rod

76 cylinder mounting

78 fluid pipe

80 fluid pipe

82 disk element

84 wrapped web

86 cup spring

88 spring

90 spring

92 spring

94 spring

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1824584Aug 4, 1923Sep 22, 1931Wood Newspaper Mach CorpPrinting couple supporting means
US2874636 *Sep 25, 1953Feb 24, 1959Harris Intertype CorpCylinder throwoff for rotary offset machine
US3034429 *Aug 6, 1959May 15, 1962Levey Fred K H Co IncPrinting press
US3256812 *Aug 13, 1963Jun 21, 1966Goebel Gmbh MaschfPrinting machines
US4643090 *Feb 26, 1985Feb 17, 1987Harris Graphics CorporationPrinting press and method
US5301609Mar 4, 1993Apr 12, 1994Heidelberg Harris Inc.Printing unit with skew and throw-off mechanisms
US5570634 *Dec 22, 1995Nov 5, 1996Koenig & Bauer-Albert AktiengesellschaftCylinder for a rotary press
US5901648Nov 26, 1997May 11, 1999Heidelberger Druckmaschinen AgDevice for adjusting printing unit cylinders in printing units of rotary printing presses
DE19916258A1Apr 12, 1999Nov 18, 1999Heidelberger Druckmasch AgEinrichtung zur Verstellung von Druckwerkzylindern in Druckwerken von Rotationsdruckmaschinen
EP0193012A2Feb 7, 1986Sep 3, 1986Harris Graphics CorporationPrinting press and method
GB2229141A Title not available
Non-Patent Citations
Reference
1European Search Report dated Jan. 20, 2000.
2German Patent Office Search Report dated Jan. 20, 2000.
3Translation of DE 19916258 which was originally provided by applicants in German in the IDS of Mar. 22, 2000.*
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6647876 *Dec 18, 2001Nov 18, 2003Heidelberger Druckmaschinen AgMechanism for actuating the throw-off of cylinders using eccentric boxes
US6694877 *Nov 17, 2000Feb 24, 2004Drent Holding B.V.Device for exchangeably supporting and positioning printing cylinders of an offset printing press
US6997630 *May 11, 2004Feb 14, 2006International Business Machines CorporationDocument feeder device with a roller adjustment device
US7096789May 4, 2004Aug 29, 2006Goss International Americas, Inc.Web printing press and method for controlling print-to-cut and/or circumferential register
US7207271Jul 11, 2006Apr 24, 2007Goss International Americas, Inc.Web printing press and method for controlling print-to-cut and/or circumferential register
US7392742Jan 31, 2003Jul 1, 2008Koenig & Bauer AktiengesellschaftDevices for supporting and adjusting a form cylinder in a printing group of a rotary printing press
US7398730 *Jul 26, 2005Jul 15, 2008Stork Prints B.V.Printing cylinder support unit, positioning element, printing cylinder provided with positioning element, printing machine provided with printing cylinder support unit, and its use
US7516698Mar 24, 2006Apr 14, 2009Goss International Americasn, Inc.Web offset printing press with autoplating
US7578235Aug 9, 2006Aug 25, 2009Goss International Montataire SaPrint unit having cylinders forming a counterweight and corresponding press
US7686526 *May 8, 2008Mar 30, 2010International Business Machines CorporationDocument feeder device
US7775159Mar 24, 2006Aug 17, 2010Goss International Americas, Inc.Cantilevered blanket cylinder lifting mechanism
US7819057Mar 24, 2006Oct 26, 2010Goss International Americas, Inc.Print unit having blanket cylinder throw-off bearer surfaces
US7823506 *Dec 22, 2006Nov 2, 2010Goss International Montataire SaPrinting unit having different extents of movement of the blanket cylinders in order to reach a throw-off configuration and corresponding printing press
US7841275 *Dec 22, 2006Nov 30, 2010Goss International Montataire SaPrinting unit having an idle throw-off configuration and a blanket changing throw-off configuration and corresponding printing press
US7845275 *Dec 22, 2006Dec 7, 2010Goss International Montataire SaPrinting unit having a throw-off configuration which allows the risks of damage to the cylinders caused by winding the web of paper to be limited and corresponding printing press
US7849796Mar 24, 2006Dec 14, 2010Goss International Americas, IncWeb offset printing press with articulated tucker
US7918161 *Dec 22, 2006Apr 5, 2011Goss International Montataire SaPrinting unit having a tubular blanket-changing throw-off configuration allowing the passage of a web of paper and corresponding printing press
US7975609 *Aug 16, 2006Jul 12, 2011Goss International Montataire SaPrinting unit having a blanket cylinder which can be moved between a throw-on position and a throw-off position and corresponding printing press
US8037818Apr 10, 2006Oct 18, 2011Goss International Americas, Inc.Print unit with single motor drive permitting autoplating
US8250976Jul 30, 2010Aug 28, 2012Goss International Americas, Inc.Cantilevered blanket cylinder lifting mechanism
US8424454Mar 4, 2011Apr 23, 2013Goss International Montataire SaPrinting unit having a tubular blanket-changing throw-off configuration allowing the passage of a web of paper and corresponding printing press
US20120024174 *Aug 2, 2010Feb 2, 2012Goss International Americas, Inc.Printing press and method for positioning cylinders therein
US20120085256 *Oct 7, 2010Apr 12, 2012Goss International Americas, Inc.Self-adjusting blanket washer mechanism for cylinders in variable cutoff printing presses
CN1915662BAug 15, 2006Jul 4, 2012戈斯国际蒙塔泰尔公司Print unit having cylinders forming a counterweight and corresponding press
CN1931574BAug 18, 2006Jul 6, 2011戈斯国际蒙塔泰尔公司Printing unit with blanket cylinder movable between a throw-on and a throw-off position and corresponding printing press
CN100488771CMay 2, 2005May 20, 2009高斯国际美洲公司Web printing press and method for controlling print-to-cut and/or circumferential register
EP1754600A2 *Aug 8, 2006Feb 21, 2007Goss International Montataire S.A.Printing unit with cylinders making counterweight and the corresponding printing press
EP2441584A2 *Mar 24, 2006Apr 18, 2012Goss International Americas, Inc.Web offset printing press with autoplating
WO2005108080A2 *May 2, 2005Nov 17, 2005Goss Int Americas IncWeb printing press and method for controlling registration
Classifications
U.S. Classification101/218, 101/185, 101/145, 101/247
International ClassificationB41F13/24, B41F13/32, B41F7/02, B41F33/08
Cooperative ClassificationB41F13/32, B41P2217/13
European ClassificationB41F13/32
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